Magnetic operator flow device
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United States of America Patent
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Oct 17, 1989
Grant Date -
N/A
app pub date -
Oct 12, 1988
filing date -
Oct 12, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A magnetically operated flow device contains a flow responsive magnetically attractable body within a flow passage defining upstream and downstream directions therein. The body is movable in upstream and downstream directions in the passage. The passage includes upstream and downstream limit positions to define upstream and downstrean limits of movement of the body within the passage. Magnetic means are provided to attract the body against the fluid flow within the passage to the upstream limit position. The body constitutes a drag obstruction to fluid flow through the passage and will, therefore, decouple from its upstream magnetically retained position in the passage and move to the downstream limit position when drag froces (i.e. flow) increase to the design limit value.
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